Abrasive-material-feeding machine



F. L. MOORE. ABRASIVE MATERIAL FEEDING MACHINE. APPLICATION mm um. 1'2. 1922.

p a: Lace eTEN? ABRASIVE-TIIATERIAL-FEEDING MACHINE.

T0 C(LZZ whom it may concern:

Be it known that I, FRANKLIN L. Moonn, a citizen of the United States, residing at Carthage, in the county of Jasper and State of Missouri, have invented certain new and useful Improvements in Abrasive-lw/lateriah Feeding Machines; and I do hereby declare the following tobe a full, clear, and exact description of the invention, such as will enable others skilled in the art to which appertains to make and use the same.

This invention relates to improvements in sand machines, and more particularly to such as are especially adapted for the feeding of abrasive material to gangs of stone saws, rubbing beds or other like points of usage.

The objectin view is the automatic'feeding of chilled shot, crushed steel, sand, or other abrasive substance uniformly and ad just-ably.

With this and further objects in view as will in part hereinafter become apparent and in part bestated, the invention coinprises certain novel constructions, combinations and arrangements of parts as subsequently specified and. claimed.

1n the accompanying drawings,-,

. Figure l is a longitudinal, vertical, central section through an apparatus embodying'the features of the present invention, parts being shown in elevation.

Figure 2 is a fragmentary, detached, end view of the motion transmitting mechanism, parts being seen in dotted lines. v

Figure 3 is a detail, perspective view of one of the agitating discs detached.

Figure 1 is an enlarged, fragmentary, detached, sectional view of the connecting rod anchorage to the motion transmitting lever.

Figure 5 is a fragmentary, transverse section taken on the plane indicated by line 5 5 of Figure 1.

Referring to the drawings by numerals, 1, 1 indicate supporting angle irons on which is mounted the hopper 2 provided with flanged fillets 3, 3 at each end bolted, at 4-, to the angle bars 1. The angle bars thus form a base or support for the hopper 2 whose apex portion projects between the bars 1 and is rounded to form a trough-like section 5. Extending longitudinally of and substantially filling the trough 5 is a screw conveyor 6, one of whose terminals is journaled in and extends through one of the end walls of the hopper 2 and fixedly carries Specification of Letter.

Patented ring. 1 52, 1922,.

.Application filed January 12, 1922. Serial No. 528,722.

a pinion 7, and a ratchet wheel 8 outside of the hopper. The other terminal of the conveyor 6 projects beyond the other end wall of the hopper and is journaled at 9 in a cross bar 10 fixed to the ends of angle bars 1. The end of hopper 2 adjacent the bearing 9 is formed with a discharge opening 11, co-incident with the trough 5, and of-a diameter slightly greater than the greatest diameter of the flights of the conveyor 6, and a semi-circular shield 12 is fixed to the inner face of the end of hopper 2 bordering the upper portion of opening '11, so that the shield 12 with the adjacent end portion of trough forms a complete tube for a short distance at the end portion of conveyor 6,

the feeding screw of the conveyor extending through the length of this tubular section. .i-irranged in planes just outside of the opening 11, and below the the same, is a discharge pipe 13, which is adapted to be located in convenient position for discharging into the pump pit or the gang gutter, or otherwise, according to the use to which the supplied abrasive material is to be put. A tank or other appropriate source of supply 143 for water or like vehicle is arranged to communicate through a pipe 15 controlled by a valve 1S with the upper end of the tube 13, the requisite quantity of water being continuously discharged for admixture with the ahrasive material in the proportions needed.

Journaled in the hopper 2, above and parallel to the conveyor 6, is a shaft 17 which extends beyond one end of the hopper and is provided witha gear wheel 18 meshing with the pinion 7. Mounted on the shaft 17 within the hopper are agi itors, each consistent of a disc 19, of thin sheet material, preferablysteel, having at diametrically opposite points on the periphery axially projecting, saw-tooth shaped fins 20, 20. For the usual size of hopper 2, three of such agitators are suilicient, but a greater or less number may be employed according to the dimensions of the hopper and the character of abrasive material being fed. Each disc 19 is provided with a hub flange or annular boss 21, which surrounds the shaft 17 and is secured thereby by an appropriate set screw 22. The shaft 17 is detachably held in position by a collar 23 locked by a set screw to the terminus of shaft 17 opposite that carrying the gear wheel 18. The shaft may thus be readily removed for repair or replacement of any of the agitators.

the ratchet face of wheel 8.

A connecting rod 24 engages a wrist pin 25,which is formed with a threaded shank 26 extending through a longitudinal slot 27 in a lever 28 journaled on the projecting end portion of the shaft of conveyor 6.'

The lever 28 is preferably bifurcated, as seen in Figure 1, and both arms of the bifurcation engage the shaft, one at each side of the ratchet wheel 8. A pawl 29 is carried by the lever 28 in position for engaging The rod 24: is reciprocated by any suitable means, as, for example, by a crank wheel 30 fixed to a power shaft 31. .The reciprocations of the rod 24 cause the lever 28 to-be swung about the axis of the shaft of conveyor 6, first in intermittently continuous, subject to ad-' justment by the adjustment of the wrist pin 25.

, It. will be noted that as the conveyor. is rotated by its shaft through the action of the ratchet wheel 8, the pinion 7 will be correspondingly rotated and will, therefore, rotate the gear wheel 18 in timed relation to movements of the conveyor, the agitators actuated by the shaft 17 under the motion of gear wheel 18 being inactive when the conveyor 6 ceases to move and moving when the conveyor 6 moves. The motion of the agitators 191 is much slower than the speed of rotation of the conveyor 6, owing to the ratio of the gearing 7 and 18, and the fins 20 offer a minimum amount of resistance to motion through heavy abrasive material while adequately agitating the material for preventing'it from packing and assuring its uniform delivery to the conveyor- 6. The faces of the several discs 19 offer very little resistance, as thereisno' lifting action, and

the only stirring. action is due to the fins 20, which are so arranged as to avoid lift ing. action and to pass through a body'of sand, or other abrasive material, in a manner to loosen and prevent packing thereof without actually stirring or lifting the substance to any appreciable degree.

Thus the abrasive material supplied to the hopper 2 is kept in the best possible condition for insuring uniformity in the feeding action'of" the conveyor 6, and the presence of the. tubular section at the discharge end of the conveyor prevents any excess or irregular feed incident to packing or drainage througl'ithe opening'll direct when exposedv by the successive turns of the conveyor flight at that point.

What is claimed is 1. An abrasive feeding machine comprising a hopper having its apex rounded to form a trough, a screw conveyor: mounted in the trough, the hopper being formed withza'discha'rge opening at one end of the trough, agitating means for preventing packing of abras1ve material above the conveyor, meansfor actuating the conveyor conveyor therefor, of an agitator comprising a disc mounted to rotate vertically within the-hopper above the: conveyor, and a saw-tooth shaped, axially extending fin-car? ried by the diso.-

4. In an abrasive feeding machine, the cornhination,with a hopper and a discharge conveyor therefor, of an agitator comprismg a disc mounted to rotate vertically within the hopper above the conveyor, and diametrically, oppositelylo'cated, axiallyextendingfins carried bythe disc.

5. In an abrasive feeding machine, the combination, with a hopper and a discharge conveyor therefor, of an agitator comprising a disc mounted to rotate vertically within the hopper above theconveyor, and axially-extending fins carried by the disc, one of said fins extending forwardly and the other rearwardly from the disc.

In testimony whereof I affix my signature in presence of two witnesses.

FRANKLIN LAWRENCE MOORE. Witnesses CLAUDE A. ABRUM, J, GORNAISE. 

